package org.jypj.dev.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

public class IpUtil {

    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        // ipAddress = request.getRemoteAddr();
        ipAddress = request.getHeader("x-forwarded-for");
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
            if (ipAddress.equals("127.0.0.1")) {
                // 根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ipAddress = inet.getHostAddress();
            }

        }

        // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
            // = 15
            if (ipAddress.indexOf(",") > 0) {
                ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }

    /**
     * 根据当前请求路径得到文件服务器的URL
     *
     * @param request
     * @return
     */
    public static String getFileServerUrl(HttpServletRequest request) {
        String file_server_port = PropertyUtil.getProperties("file_server_port");
        String file_server_url = PropertyUtil.getProperties("file_server_url");
        String serverName = request.getServerName();
        String fileServerUrl = "http://" + serverName + ":" + file_server_port;
        return file_server_url;
    }

}
